虽然掺钛蓝宝石激光器提供可调谐红外输出，但用脉冲激光器产生可调谐输出，历来属染料激光器的范畴。最近光参量振荡器已成为引人注目的光源，它使调谐范围扩大，使用也较容易。对染料和钛蓝宝石激光器以及多数商业化光参量振荡器，基频调谐范围扩大到可见和近红外光谱区。但 Although titanium-doped sapphire lasers provide tunable infrared output, the use of pulsed lasers to produce tunable output has traditionally been the domain of dye lasers. Recently, the optical parametric oscillator has become a noticeable light source, which makes the tuning range wider and easier to use. For dye and titanium sapphire lasers and most commercial optical parametric oscillators, the fundamental tuning range is extended to the visible and near-infrared spectral regions. but